You need the part below for assembling the Y-axis
- 2x smooth rod 410mm, 8 mm diameter
- 2x M10 threaded rod, 440 mm
- 4x M10 threaded rod, 210 mm
- 3D printed Y corners
- 3D printed Y axis motor holder
- 3D printed axis idler printed part
- 12x M10 nut
- 12x M10 washer
- 22x M8 nut
- 22x M8 washer
- 2x M3x10 bolt
- 2x F624 bearing
- 1x M4x30 bolt
- 1x M4x20 bolt
- 3x M4 nut
- 1x M4 washer
Mounting the Y-Axis carriage and parts
Take a stepper motor, the Y axis motor holder printed part and two M3x10 bolts. Mount it to the motor as shown. Set aside for later.
Mount the two bearings with the M4 bolt and 2 M4 nuts on the idler. Take care not to over-tighten the bolt; the two bearings have to rotate freely.
The M4 nut almost never fits in the trap. Don’t force it in, you might damage the printed part. Instead use a soldering iron to heat the nut, and gently push the nut into the trap.
Side view of the idler.
The belt tension-er mounted in the Y-frame Mounting the Y-frame is pretty straightforward. Take care you place the axis and the bearings of the idler exactly in the middle of the frame.
For both the X-Axis and the Y-Axis you need approximately xx cm (yy inch) of timing belt. I used 2.0 mm pitch timing belt (GT2) and two GT2 pulleys with 20 teeth. You will need this data when calibrating the printer.
Slide the pulley onto the motor shaft as shown and tighten it with two M3x4 grub screws. Leave a bit of space between the motor body and the pulley.
To complete the next step, your Heated Bed should be ready and mounted on the plywood (see chapter 6). Flip over the Y-Axis and use wood screws to attach Y-belt clamp to the plywood. Pass the belt over the motor and belt tensioner and put together both ends of the belt and fasten them with tie-wraps. Use the idler to set the tension of the belt.
Installing the Y-Axis carriage on the wooden frame
If your frame is finished, you can install the Y-Axis carriage on the boxed frame. If you have used 12mm plywood (like I did), you will notice that you need to fill up a gap between the 10mm threaded rods. I used two pieces op plywood of 7 mm thick.
One other problem I ran into was the Y-Axis stepper motor. Its base collided with the boxed frame and I had to carve out a couple of mm plywood to fix this.
Now proceed to chapter 3: The X-Axis